/**
 * Noise3D. 
 * 
 * Using 3D noise to create simple animated texture. 
 * Here, the third dimension ('z') is treated as time. 
 */

// /**
public class Noise3D extends NApplet {
  float increment = 0.01;
  // The noise function's 3rd argument, a global variable that increments once per cycle
  float zoff = 0.0;  
  // We will increment zoff differently than xoff and yoff
  float zincrement = 0.02; 

  public void setup() {
    size(200,200,P2D);
    frameRate(30);
  }

  public void draw() {
    background(0);

    // Optional: adjust noise detail here
    // noiseDetail(8,0.65f);

    loadPixels();

    float xoff = 0.0; // Start xoff at 0

      // For every x,y coordinate in a 2D space, calculate a noise value and produce a brightness value
    for (int x = 0; x < width; x++) {
      xoff += increment;   // Increment xoff 
      float yoff = 0.0;   // For every xoff, start yoff at 0
      for (int y = 0; y < height; y++) {
        yoff += increment; // Increment yoff

        // Calculate noise and scale by 255
        float bright = noise(xoff,yoff,zoff)*255;

        // Try using this line instead
        //float bright = random(0,255);

        // Set each pixel onscreen to a grayscale value
        pixels[x+y*width] = color(bright,bright,bright);
      }
    }
    updatePixels();

    zoff += zincrement; // Increment zoff
  }
}
// */
